Finding the Fourth Proportional to 42,392.63, 63,578.32 and 17,439.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,392.63 : 63,578.32 = 17,439.57 : x
2. Step 2: Convert to fraction form
   42,392.63/63,578.32 = 17,439.57/x
3. Step 3: Cross multiply
   42,392.63x = 63,578.32 × 17,439.57
4. Step 4: Simplify right side
   42,392.63x = 1,108,778,518.52
5. Step 5: Solve for x
   x = 1,108,778,518.52/42,392.63
6. Step 6: Final answer
   x = 26,154.98